Belt filter press

Abstract

The invention discloses a belt filter press which mainly comprises a rack, a flocculation zone, a thickening and dewatering zone, a gravity dewatering zone and a squeeze dewatering zone, wherein a flocculation mixer is arranged in the flocculation zone; the thickening and dewatering zone comprises a plurality of horizontally arranged driving rollers and thickening filter belts arranged on the driving rollers; the gravity dewatering zone is positioned below the thickening and dewatering zone and comprises a plurality of arc-shaped cladding rollers, upper filter belts and lower filter belts; the arc-shaped cladding rollers, the upper filter belts and the lower filter belts are fixed on the rack and obliquely arranged; the squeeze dewatering zone comprises a plurality of squeezing rollers which are vertically arranged in a staggered manner as well as squeezing filter belts; mud removing rollers are arranged on the rear parts of the squeezing rollers; and a scraper is connected onto the mud removing rollers. The belt filter press disclosed by the invention is scientific and reasonable in structural design, capable of integrating flocculating, thickening and press filtering, excellent in mud scraping effect, long in service life of the filter belts and few in usage of cleaning water.

Description

technical field [0001] The invention relates to the field of solid-liquid separation, in particular to a belt filter press. Background technique [0002] Belt filter press is suitable for sludge dewatering in wastewater treatment processes in urban sewage treatment plants, pharmaceuticals, electroplating, papermaking, leather, printing and dyeing, metallurgy, chemical industry, slaughtering, food, brewing, coal washing and environmental protection projects. It is also used in industrial production. It can be used in the occasion of solid-liquid separation, and is an ideal equipment for environmental governance and resource recovery. The dehydration process of the belt press filter can be divided into four important stages: pretreatment, gravity dewatering, wedge-shaped zone pre-pressing dehydration and press dehydration. Its working principle is that in the pretreatment stage, the flocculated material is gradually added to the filter belt. The free water outside the flocs i...

AI Technical Summary

Problems solved by technology

The gravity dewatering section removes a large part of the water in the sludge; after the sludge gravity dewatering, the fluidity becomes significantly worse, but it is still difficult to meet the requirements of the sludge fluidity in the pressing dewatering section. Therefore, in the sludge pressing and dewatering section Between the gravity dewatering section and the gravity dewatering section, a wedge-shaped pre-pressing dewatering section is added. After the sludge is dewatered by slight extrusion of this section, the free water on the surface is removed, and the fluidity is almost completely lost. This ensures that the sludge is in normal condition. It will not be squeezed out in the pressing dewatering section, which creates conditions for smooth pressing and dewatering. After pressing and dewatering, the sludge scraper scrapes the squeezed sludge from the filter belt to the sludge recovery bucket, and then the filter belt is cleaned. Therefore, the mud scraping effect of the mud scraper will affect the service life of the filter belt and the water consumption for cleaning the filter belt. At present, most of the improvements to the belt filter press are for the filter press components. Clay pots are rarely improved

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